After a brief rest, Yu Kai took a deep breath and stomped his feet hard, using the surrounding walls for leverage. Like lightning, he rushed toward the rooftop where the giant bird had descended. With a few swift, deflecting movements, he was firmly on top. With a light leap, he landed firmly on the water storage tower.

He gazed solemnly at the hellish streets, devastated and thick with smoke. He closed his eyes, focused his attention, and used his spiritual power to carefully sense his surroundings. He clung to a glimmer of hope, hoping to detect the presence of survivors, but the result was utter disappointment.

Because these mutants had fallen into a frenzy, attacking and devouring each other. If there were still living creatures, the scene would never be like this. Just like when they chased him before, as soon as they sensed the presence of a living person, they would stop attacking each other and turn to attack humans.

Yu Kai stared at the chaotic scene, his brow furrowed, a wave of sadness and anger welling up in his heart. His clenched fists were white from the force, and his eyes seemed to blaze with fire. Then, without hesitation, he leaped from the roof. "My prey, come and die!" His roar resonated like thunder, instantly attracting all the mutants in the town.

"Roar! Roar!" A deafening roar echoed in succession. The mutant creatures rushed towards him like a tide.

Yu Kai showed no sign of panic; instead, his eyes blazed with a fierce fighting spirit. Spiritual energy surged frantically within him, a continuous "crackling" sound echoing as pieces of metal alloy, transformed from spiritual energy, quickly joined together. Two metal arms instantly took shape, gleaming with a cold light. "Kill!" he roared, his voice resonating as he charged towards the overwhelming swarm of mutant creatures.

"Bang! Bang! Bang!" Fierce collision sounds continued to ring out. One mutant creature after another was smashed into pieces under his iron fist. Shining beads of light scattered out from the bodies of the mutant creatures, causing all the mutant creatures to fight for them frantically.

Yu Kai, however, grew more courageous as the battle wore on, striking again and again, each blow imbued with immense force. One mutant after another perished in his onslaught, and like a tiger descending from the mountains, he tore through the mutants, leaving them crumbling wherever he went. Despite his numerous numbers, none could match him.

The light beads on the ground grew in number. The mutants, frightened by Yu Kai, were filled with both fear and envy. Driven by greed, they charged towards him fearlessly. Yu Kai was like a tireless fighting machine, fighting from afternoon until late at night. The entire street was stained red with the mutants' blood. The scattered light beads shimmered on the ground, illuminating the entire street like daylight.

His terrifying exploits deeply shocked all the surviving mutants and also shocked the world through monitoring satellites. At this point, all nations were caught in the nightmare of mutant attacks. Ordinary firearms and artillery were powerless to inflict any substantial damage on these mutants. As the number of lives they devoured increased, their power grew stronger.

Now, attacking tanks and armored vehicles are vulnerable to them and can be easily ripped apart by them. These mutant creatures not only possess great strength, but also possess a certain degree of intelligence. They know how to avoid human traps and choose the weakest link to attack.

This plunged the entire planet into extreme panic, and social order nearly collapsed. To combat the mutants, nations poured vast resources into the fight, but the impact was inadequate. Countless cities fell, and resource scarcity grew increasingly severe. Food, medicine, energy, and other essentials were in dire shortages, and people struggled for survival amidst despair and fear.

At the Nantianmen construction base, Academicians Fang, Chao Tian, ​​and others stared gravely at a sturdy cage crafted from high-strength titanium alloy. Their faces were filled with worry. Imprisoned within this cage was a mutant creature that the military had painstakingly captured.

At that moment, the mutant rabbit inside was frantically ramming the cage, the immense force causing it to tremble slightly. Its eyes were red, and its sharp fangs occasionally bit fiercely at the titanium alloy bars, making a piercing "chi chi" sound that sent shivers down its spine.

They had tried many methods to subdue the mutant rabbit. Whether it was high-intensity electric shocks or attacks with various new weapons, although they could leave scars on it and cause it a certain degree of damage, the mutant rabbit remained vigorous and stubbornly resisted, making it difficult to completely kill it.

Academician Fang's brow furrowed, the wrinkles on his forehead etched with deep worry. Academician Chao Tian frantically recorded various data and observations in his notebook, mumbling to himself as he pondered his next strategy. The other researchers also gathered around the cage, whispering and discussing, their faces etched with anxiety and helplessness.

At this moment, a researcher hurried over with a laptop computer, "Mr. Chao, Mr. Fang, look, this is the satellite image from the command center!" His voice trembled with urgency.

Both of them took the computer and looked at it eagerly, without blinking, for fear of missing any details.

"Is Yu Kai in trouble?" Old Chen also stepped forward in two steps, the worry on his face was beyond words, and there was obvious anxiety in his voice.

"This... is this person who slaughtered the mutant creatures Yu Kai?" Old Chen looked at the computer screen with his eyes wide open and asked in surprise, his lips trembling slightly.

"Are those glowing objects on the ground all mutant beads?" Elder Chen quickly brought over a glass instrument from the lab bench. It contained a single light bead. Academicians Chao Tian and Fang quickly compared the two. Upon seeing the results, they took a deep breath, their faces filled with shock.

"How many mutant creatures must be killed to get so many mutant beads? I heard that the military suffered heavy casualties in trying to seize these mutant beads from the mutant creatures!" Academician Fang couldn't help but swear, and the veins on his forehead bulged.

"Has Yu Kai also mutated? How could he be so strong?" Old Chao frowned, staring at the screen, lost in thought.

"Yeah, what's wrong with his mechanical arm? Wasn't the Hongmeng No. 1 mecha destroyed by the alien mecha? Where did his mechanical arm come from, and it's so powerful!" Academician Fang asked in confusion, his eyes full of doubts and confusion.

"Look! These mutants have actually escaped!" Elder Chen said, his eyes fixed on the screen. The other two also noticed what was happening. "The mutants are so scared they've even abandoned the precious mutation beads?" Academician Fang muttered softly. "Don't these mutation beads have an evolutionary effect on mutants? How could they have all escaped?" His face was filled with disbelief, and he shook his head repeatedly.